Musnad Ahmad 97:1

Yahya ibn Sa'id narrated to us, from Shu'bah, who said: Mansur narrated to me, from Tamim ibn Salamah, from 'Ubayd ibn Khalid—and he was one of the companions of the Prophet, peace and blessings of Allah be upon him—who said: "Sudden death is a seizure of anger." And he narrated it once [attributing it] to the Prophet, peace and blessings of Allah be upon him.